Cold and hot air flue of stoves



5 Sheets Sheet 1 (No Model.)

W. RUBE.

GOLD AND HOT AIR FLUE 0F STOVES.

No. 434,403. Patented Aug. 12, 1890.

5 Sheets-Sheet 2.

(No Model.)

W. RUBE. 00m) AND HOT AIR FLUB 01E STOVES. No. 434,403. Patented Avg. 1.2, 1890.v

fiLamm/df YNIORRB PEYERi co, moro-umm, WASHINGTON u c (No Model.) 5 Sheets-Sheet.4

W. RUBE.

GOLD AND-HOT AIR FLU-E OF STOVES.

Patented Aug. 12, 1890;

.m. a 711W (No Model.) 5 Sheets-Shet 5. W. RUBE.

00m) AND HOT AIR FLUB 0F STOVES. No. 434,403. Patented Aug. 12, 1890.

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UNITED STATES PATENT QFFICE.

WVILLIAH RUBE, OF ST. LOUIS, MISSOURI.

COLD AND HOT AIR FLUE OF STOVES.

SPECIFICATION forming part of Letters Patent No. 434,403, dated August 12, 1890.

Application filed November 17, 1888. Serial No. 291,172. (No model.)

To all whom'it may concern.-

Be it known that I, \VILLIAM RUBE, acitizen of the United States, and a resident of St. Louis, in the State of Missouri, have invented certain new and useful Improvements in Magazine-Stoves, of which the following is a full, clear, and exact specification.

My invention relates, generally, to magazine-stoves, and particularly to that class of such stoves in which. the smoke and other products of combustion are carried down through their grates; and it consists in the improved construction and arrangement or combination of parts hereinafter fully disclosed in the description, drawings, and claims.

The objects of my invention are, first, to provide improved means for keeping the magazine or feeder cool, and thus preventing the heating of the coal therein and the consequent generation of gases; second, to provide improved means for conveying such gases as may be generated in the magazine down ward and into the fire-pot, where they will be consumed; third, to provide improved mechananism for admitting cold air into the top of the magazine and to the coal therein for keeping the latter and the walls of the magazine perfectly cool and for carrying the smoke and gases downward and into the firepot; fourth, to provide improved means for keeping the cold-air flues free from the heat of the stove and perfectly cool; fifth, to provide improved devices for governing the passage of cold air into and through said cold-air flues; sixth, to provide improved means for either heating the base or the upper portion of the stove, and, seventh, to provide the stove with a novel construction and arrange ment of hot-air fines for heating its lower portion or base simultaneously with its upper portion. These objects I attain by the construction of stove illustrated in the accompanying drawings, forming part of this specification, in which the same reference-numerals indicate the same parts, and in which- Figure 1 represents a perspective view of my improved stove; Fig. 2, a vertical section of the same, the section being taken through the stove-pipe or on the dotted line '0 'v of Fig. 1; Fig. 3, a vertical section of the same, the

section being taken through two of the coldair fines or on the dotted line to w of Fig. 1, the downwardly-flaring box being shown in side elevation; Fig. 4, a transverse horizontal section of the same, the section being taken on the dotted line so a; of Figs. 2 and 3 or through the ash-pit and its casing just below the grate; Fig. 5, a similar section of the hotair chamber of the stove just below its top plate or the bottom of the ash-pit, the section being taken on the dotted line y y of Figs. 2 and 3; Fig. 6, a transverse horizontal section of the upper part of the stove, the section being taken on the dotted line zz of Fig. 3; .and Fig. 7, a perspective view of the hot-air chamber and the cold-air fiues, the top plate of said chamber being raised from the bottom plate to show the openings in the former and the central and side horizontal passages in the latter.

In the drawings, the numeral 1 indicates the I outer drum of the stove, which is preferably cylindrical in form, and to the outer surface thereof are secured four vertical tubes 2, which are arranged at right angles to each other and formed with Vertical slots 3 in their outer sides. The inner drum 4 is likewise cylindrical in form, and is secured within said outer drum at a short distance therefrom,

so as to leave an annular space 4 between 7 them. This inner drum is held or supported in proper relation to the outer drum by means of an annular horizontal flange or plate 5, which is secured to the formernearits upper end, projects outwardly therefrom, and rests upon a flange 5 on the inner surface of the latter. This plate serves to close the upper end of the annular space 4'. The outer drum rests or is supported upon the plate 6, which supports the fire-pot and grate.

The magazine or feeder is composed. of an outer and an inner cylinder or jacket 7 and 8, which are arranged within an inner drum 4, the outer jacket 7 being provided at its upper end with an annular outwardly-projecting flange 9, which rests upon the upper end of said drum, and the inner jacket 8 is also provided at its upper end with an annular outwardly-projecting flange 10, which fits in and is supported by an angular recess 10 formed in the upper end of said outer jacket. 'By

this arrangement of said jackets an annular space 10 is formed between their walls for containing cold air. The lower end of the inner drum 4 terminates a short distance above the upper end of the fire-pot 11, leaving a small annular space 11' between them, through which cold air passes out from the feeder and into the annular space 4' between the outer and inner drums 1 and 4 of the stove. This fire-pot is supported upon the plate 6, which is provided with a grate 12, arranged in the bottom of said fire-pot.

The outer and inner drums 1 and 4 of the stove are formed withopenings 13, which register with a flange 14, projecting outwardly from around the opening in said inner drum and into the opening in said outer drum, a suitable door 15 being arranged over these openings on the front side of the stove, as shown in Fig. 2. Over the upper ends of the two drums is placed and suitably secured a top plate 16, which is formed with a central hole 17, which leads to the magazine or feeder and is closed by a lid or cover 18.

Four cold-air fines 19 pass up from the bottomv of the stove through the four corners of the hot-air chamber and the casing of the ashpot, hereinafter described, and through the vertical slotted tubes 2, said flues being connected at their upper ends to short horizontal inwardly-extending fines 20, which pass through openings in the inner drum 4, and at their inner ends are formed with small holes 21.

In the upper end of the outer jacket 7 are formed four holes 22 and 23. Two of said short horizontal flues 20 register at their inner ends with said holes 22 and deliver cold air into the space 10 between said outer jacket 7 and the inner jacket 8 of the magazine or feeder. The inner ends of the two other or opposite short fines 20 pass through the other two holes 23 in the outer jacket and register with two holes 24, formed in said inner jacket. (See Fig. 6.) These two last-named holes open into two downwardly extending duets 25, which are formed with small holes 20 for their entire lengths, and with open lower ends. These ducts are secured to the inner surface of the inner jacket Sand serve to convey cold air to the inside of the feeder between the lumps of coal therein and down into the firepot,the inside of said feeder and the coal therein being thus kept cool, and at the same time the air passing therethrough serves to carry the smoke and gas generated in the fire-pot down through the same and into the ash-pit beneath.

Thelower ends of the cold-air flues 19- there being two of them on each side of the stove-are connected to downwardly-flaring rectangular boxes 27 which are open at their bottoms and provided with short vertical tubes 28, which are secured in holes formed in the closed tops of said boxes and adapted to be adjusted or telescoped within the lower ends of said cold-air fines and to be adjusted at various heights from the floor by means of set-screws 29, which pass through the lower ends of said flues and bear against the outer surfaces of said short tubes. Dampers 30 are placed and adapted to be slid upon the tops of the boxes 27 and serve to either partly or entirely close said short telescopic tubes,

which for this purpose are slotted on a linejust above the tops of the boxes for the reception of said dampers, whereby the upward passage of the cold air through the cold-air flues can be accurately adjusted or regulated.

At the bottom of the stove is formed a heat reservoir 30, which consists of a top plate 31 and a bottom plate 32, respectively provided with downwardly and upwardly projecting flanges or walls 31 and 32, which may be socured together and to the cold-air flues by any suitable means. This heat-reservoir and the stove are supported above the floor upon legs 33, which project downwardly from the top plate 31. Two partitions 34 extend forwardly from the rear wall of the bottom plate 32 toward the front wall of the same, thus forming a wide central horizontal passage 35, which communicates at its forward end with two narrow horizontal side passages 36. The top plate 31 is formed with an opening 37 near its rear edge, which communicates with said wide central passage 35, and is designed to be opened and closed by a sliding damper 38, which is operated from the right-hand side of the stove, as shown in Fig. 7. Two openings 39 and two 39 are respectively formed in said top plate near the rear and front edges of the same, and respectively adwit the products of combustion into and discharge the same from the rear and forward ends of the side passages 36 of the heat-reservoir 30. The rear opening 37 in the top plate communicates with a vertical passage 40 in rear of the rear wall of the ash-pit 4l, and with the lower end of the stove-pipe 42, which connects with the upper portion of said passage.

In the rear wall of the ash-pit is formed an opening 43, over which is placed an adj usiable or slidable damper 44. This opening communicates with the ash-pit 41, which is open on its front side and closed by a suitable door 45.

The openings 3.) and 39', which are over the side passages 36 near the rear and front ends of the same, communicate with four vertical passages 46 and 47, which are formed outside of the side walls of .the ash-pit and near the rear and front ends of the same. The front passages 47 are open at their upper ends and communicate with the annular space surrounding the fire-pot. The rear openings 39 over the side passages 36 communicate with the vertical passages 46, which are closed at their upper ends and formed with openings 48 in their inner walls, over which are placed sliding dampers 49. These openings are in communication wit-h the upper part of the ash-pit.

The stove-pipe 42 is provided with a short branch pipe 50, which connects with an opening leading into the upper part of the annular space 4, formed between the outer and inner drums of the stove. This branch pipe is provided with an adjustable damper 51 for regulating the escape of the products of combustion from the upper part of the stove through the stove-pipe.

The corners of the casing 51 of the ashpit are formed with Vertical slots 52, which open into vertical passages 53, through which the cold-air flues 19 pass. These slots are for the purpose of admitting cold air within said passages and preventing the heat reaching said cold-air flues from the ash-pit and fire-pot.

The operation and advantages of the several parts of my improved magazine-stove, in addition to those hereinbefore specified, are as follows; For-starting the fire the door is opened and a proper quantity of coal placed upon the grate in the fire-pot 11; then kindling is placed upon the top of the coal and lighted; then after the fire has been started, the draft of air being downward, the door 15 is closed; then the coal is fed through the opening 17 into said fire-pot and the magazine or feeder until they are filled; then after a suificient degree of heat has been generated cold air is admitted past the dampers of and through the rectangular boxes 27, and thence into the cold-air flues 19 and 20, passing thence to top of the stove, where a portion of said cold air, which ascends through two of the flues 19, escapes through the holes 21 in two of the short flues 20, which rest at their inner ends in the holes 22 in the outer jacket 7, enters into the space 4 between the inner drum 4 of the stove and said outer jacket, and cools the outside of said feeder; then the remainder of the cold air which ascends through the other flues 19, which passes through the other two short flues 20, which rest in the holes 23 in said outer jacket and register at their inner ends with the holes 24 in the in ner jacket 8, enters the perforated ducts 25 on the inside of the inner jacket, and then this part of the cold air passes out of' the holes 26 in said ducts and into the interior of the feeder and between the pieces of coal therein, keeping the same cool and carrying all smoke and gas downward into the firepot, where they are consumed. Under the construction and arrangement of these parts the feeder itself and the coal therein will be kept perfectly cool, and consequently no gas, or very little, will be generated; also, all the products of combustion, owing to the downwardly-moving current of cold air, will be carried into the fire-pot and burned-in their downward passage through the grate. This action is further augmented by the cold air that passes out through the annular space 11', existing between the lower end of the innor drum 4 and the top of the fire-pot 11, and keeps comparatively cool the space around the latter and between the outer and inner drums of the stove. The vertical slots 3 and 52, respectively formed in the vertical tubes 2 and in the passages 53 at the corners of casing d1, serve to maintain a low temperature around the cold-air flues 19, whereby the air which passes up through said flues will not be affected by the heat within the stove, but will be protected or shielded therefrom by the cold air surrounding said flues, After the fire has been started and a sufficient degree of heat has been generated the smoke and other products of combustion passing downward through the grate 12 and into the ash-pit 41 will ordinarily pass through the opening 43 and into the passage 40 and thence out through the stove-pipe 42. For confining the heat in the lower part of the stove for thoroughly heating the same at that point the products of combustion pass down from the Then the fire-pot 11 into the ash-pit 41.

damper 44 is closed over the opening 43, which I prevents the products of combustion from escaping from said ash-pitthrough the passage 40, leading to the stove-pipe 42. Then the dampers 49 over the openings 48 in the side walls of the ash-pit are opened, which allows the products of combustion to enter into the closed top passages 46 near their upper ends and pass down through the same into the horizontal side passages 36 of the heat-reservoir 30. Then the rear damper 38, which is over the opening 37, that leads into the rear vertical passage 40, is nearly closed, so as to prevent the heat and products of combustion from escaping too freely through the latter and the stove-pipe, only a slight draft therethrough being hecessary, the damper 51, connected with said stove-pipe, being also closed in the meantime. When it is desired to'simultaneously heat both the lower and upper portions of the stove, the dampers 49 over the openings 48 in the side walls of the ash-pit are opened, which allows the products of combustion to enter the closed top passages 46 near their upper ends and pass down through the same into the horizontal side passages 36 of the heat-- reservoir 30.' Then the rear damper 38 is closed over the opening 37 to prevent their escape from the ash-pit out through the passage 40 and the stove-pipe 42,

and then the damper'51 in the branch pipe in the upper part of the stove is opened. The products of combustion will then .pass

down through the fire-pot and grate'and into the ash-pit, thence through the openings 48, thence down through the rear vertical passages 46 and into the side passages 36 of the heat-reservoir 30, and thence up through the front vertical open-topped passages 47 and into the space 4, leading to the upper part of the stove, the smoke passing out through the short branch pipe 50 and the stove-pipe 42. The boxes 27, having the short tubes 28 telescoping into the cold-air flues 19, are adjustable to any desired distance from the floor, according to the height of the legs or feet of the stove and the height from which it is desired or necessary to obtain the cold air; also, the upward passage of the cold-air currents through said boxes, tubes; and pipes can be regulated by the dampers 30 in the lower ends of said short tubes.

Having thus fully described the construction and arrangement or combination of the several parts of my improved stove, their operation and advantages, what I claim as new 1s- 1. In a magazine-stove, the combination, with the feeder composed of two jackets, of cold-air fines extending from below'the base of said stove and connecting at their upper ends with the space between said jackets, the downwardlyfiared vertically-adjustable boxes secured to the lower ends of said fines, and dampers for regulating the passage of the air through said fines, substantially as and for the purpose described.

2. with a feeder composed of the outer jacket 7, formed with the holes 22, and the inner jacket 8, formed with the holes 23, of the Vertical cold-air fines 19 and the short horizontal flues 20, formed with the holes 22 and arranged to register at their inner ends with the holes in said jackets, substantially as and for the purpose described.

3. In a magazine-stove, the combination, with a feeder composed of an outer and an inner jacket and formed with holes in their upper portions, of perforated ducts arranged on the inner surface of said inner jacket and cold-air fines extending from below the base of saidstove and connecting at their upper ends with the holes in said jackets, with the space between said jackets and with said perforated ducts, substantially as and for the purpose described.

4. In a magazine-stove, the combination, with a feeder composed of an outer and an inner jacket 7 and 8 and provided with perforated vertically-arranged ducts 25 upon the inner surface of said inner jacket, of cold-air fines l9 and 20, extending from below the base of said stove and connecting with said ducts,

and the space 10" between said jackets, and

vertically-slotted cold-air tubes 2, surroundingsaid cold-air fines, substantially as and for the purpose described.

5. In a magazine-stove, the combination, with a feeder composed of an outer and an inner jacket 7 and 8 and provided with perforated vertically-arranged ducts upon the inner surface of said inner jacket, of cold-air fines 19 and 20, extending from below the base of said stove and connecting with said ducts, and the space 10 between said jackets, and vertically-slotted cold-air tubes 2 and vertically-slotted cold-air passages 53, surrounding said cold-air fines, substantially as and for the purpose described.

6. In a magazine-stove, the combination,

In a magazine-stove, the combination,

{with a feeder composed of an outer and an inner jacket '7 and 8 and provided with perforated vertically-arranged ducts 25 upon the inner surface of said inner jacket, of cold-air fiues 19 and 20, extending from below the base of said stove and connecting with said ducts, and the space 10 between said jackets, and vertically-slotted cold-air tubes 2 and vertically-slotted cold-air passages 53, surrounding said cold-air fines, vertically-adjustable boxes 27, secured to the lower ends of said fines, and dampers for regulating the passage of the air therethrough, substantially as described.

7. In a magazine-stove, the combination, with a stove-drum, a feeder composed of two jackets, and a fire-pot and grate arranged below said feeder, of cold-air fines extending from below the base of said stove and connecting at their upper ends with the spacebetween said jackets and with the interior of said stove-drum, substantially as described. 8. In a magazine-stove, the combination, with a stove-drum, a feeder, and a fire-pot, of vertical cold-air flues extending from below the base of said stove and communicating :with the upper portions of said drum and feeder, and vertically-slotted tubes surrounding said cold-air fines, substantially as and for the purpose described.

9. In a magazine-stove, the combination, with the outer and inner stove-drums 1 and 4, a feeder, and a fire-pot 1.1, having a grate 12, of the vertically-slotted tubes 2 and the cold-air fines 10, arranged within said tubes and connected at their upper ends to said drums and feeder, substantially as and for the purpose described.

10. In a magazine-stove, the combination, with the outer and inner stove-drums, a feeder, and a fire-pot 11, having a grate 12, of the vertically-slotted cold-air tubes 2, arranged outside of said drums, the rectangular openbottomed adjustable boxes 27, provided with the short tubes 28, which telescope inside of the lower ends of said cold-air fines, and the dampers 30, arranged upon the upper sides of and adapted to regulate the upward passage of cold air from said boxes, substantially as described.

11. In a magazine-stove, the combination, with the ash-pit 41 and the casing 51, provided with the inlet and outlet passages 46 and 47, arranged intermediate of the side walls thereof, of the heat-reservoir 30, arranged beneath the same, formed with inlet and outlet openings 39, 39, and 37 in its top plate and provided with interior horizontal passages and 36, communicating with said openings and passages above, substantially as and for the purpose described.

12. In a magazine-stove, the combination, with the ash-pit 4:1 and the casing 51', provided with the inlet and outlet passages 46, t7, and 40, arranged intermediate of the side walls thereof, of the heat-reservoir 30, ar-

- 434,403 r t I ranged beneath the same, formed with inlet into and from said passages and openings, itild outleit openiggs 39, i9, and 37 111 its top substantially as described. p ate an provi ec Wit interior lorizontal v passages 35 and 36, communicating with said WILLIAM RUBE' 5 openings and passages above, and dampers Witnesses:

49, 44, and 38 for regulating the entrance WVILLIAM QUITZOW, and discharge of the products of combustion HENRY B. KERONE. 

